Dear Prudence,
My sister is estranged from my entire family except for me, and her kids have had limited contact with their grandparents and never met any other family members. When I told my sister I was getting married, she immediately said she’d love to come to the wedding and bring the kids with her. The rest of the family is understandably apprehensive about how to behave around them. I’ve given them instruction to treat her as an acquaintance and not get into personal conversations unless she takes the lead. But some are pressing for rules. Any advice on what to tell them? Is there any sense in drawing up rules, or is it safe to assume that everyone’s been in a social setting with someone who doesn’t like them and knows how to behave?
—Estranged Sister With a Twist